EP0528385B1 - Procédé pour le laminage continu à chaud de bandes - Google Patents

Procédé pour le laminage continu à chaud de bandes Download PDF

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Publication number
EP0528385B1
EP0528385B1 EP92113929A EP92113929A EP0528385B1 EP 0528385 B1 EP0528385 B1 EP 0528385B1 EP 92113929 A EP92113929 A EP 92113929A EP 92113929 A EP92113929 A EP 92113929A EP 0528385 B1 EP0528385 B1 EP 0528385B1
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EP
European Patent Office
Prior art keywords
sheet
sheet bar
sheet bars
bars
gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92113929A
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German (de)
English (en)
Other versions
EP0528385A1 (fr
Inventor
Masanori c/o Technical Research Div. Kitahama
Kunio C/O Technical Research Div. Isobe
Norio C/O Chiba Works Takashima
Toshisada C/O Chiba Works Takechi
Fujio c/o Chiba Works Aoki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP3229754A external-priority patent/JPH0550112A/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0528385A1 publication Critical patent/EP0528385A1/fr
Application granted granted Critical
Publication of EP0528385B1 publication Critical patent/EP0528385B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K13/00—Welding by high-frequency current heating
    • B23K13/01—Welding by high-frequency current heating by induction heating
    • B23K13/015—Butt welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0085—Joining ends of material to continuous strip, bar or sheet

Definitions

  • the present invention relates to a method of continuously hot-rolling a multiplicity of sheet bars such as steel slabs, billets, blooms or the like, or sheet bars composed of other metals.
  • hot-rolling lines have been so arranged that individual sheet bars are roughly rolled, and are then finish hot-rolled one by one to a predetermined thickness.
  • hot-rolling encounters line stoppage problems if the raw steel material to be rolled is defectively caught at the time of the hot finish rolling process. What is even worse, the yield seriously deteriorates in the event of defective shaping of the leading portion or the trailing portion of the steel or other raw material to be rolled.
  • the inventors of the present invention have disclosed a joining method in International Publication No. WO92/02313, No. WO92/02314 and No. WO92/02315, the joining method being so conducted that the rear end portion of the leading sheet bar and the front end portion of the trailing sheet bar are partially cut so as to bring at least the two widthwise edge portions of the two sheet bars into contact with each other, a gap is created between the two sheet bars, and the contact portions are locally heated and pressed. As a result, the joining work can be more quickly and easily performed.
  • the aforesaid method is subject to further improvement because breakage and separation where the sheet bars are joined up cannot be completely prevented due to a fact that the gap between the two sheet bars cannot be completely eliminated in the hot-rolling process.
  • JP-A-59-130603 there is known a method of continuously hot-rolling sheet bars in which a rolled leading sheet bar and a trailing sheet bar are butted prior to a subsequent rolling step. Thereafter the abutted portions are welded together thereby simplifying the joining of rolling materials and improving productivity.
  • EP-495989 A1 which is a document in the meaning of Article 45(3) EPC there is disclosed a method of joining billets during hot rolling in which a preceding billet and another following billet are brought into butt contact with each other whereupon both breadthwise ends of said billets are cut such as to cause the leading end trailing billets to contact only at both their breadthwise ends. Said contacting billet ends are locally heated and pressed so as to be joined with joining areas gradually enlarged.
  • EP-495124 A1 which is a document in the meaning of Article 54(3) EPC there is disclosed a method of continuously hot rolling steel sheets and joining these sheets wherein the forward end portion of a steel sheet is preliminary joined with the tail end portion of the forgoing steel sheet.
  • Fig. 1 schematically illustrates a hot-rolling line.
  • Reference numeral 1 represents a leading sheet bar which has passed through rough rolling mills, and 2 represents a trailing sheet bar following the leading sheet bar 1.
  • Reference numeral 3 represents a hot finish rolling mill having rolling mill stands F1, F2,..., arranged in a tandem manner; 4 represents a cutting device for cutting the front end portion and the rear end portion of the sheet bars, and 5 represents pressing rolls for thickness reduction of at least the two widthwise directional ends, or corners, of each of each successive rear end portion of the cut leading sheet bar 1 and/or the front end portion of the trailing sheet bar 2.
  • Reference numeral 6 represents a thermal joining device for thermally joining the sheet bars 1 and 2
  • 7 represents a scale breaker for removing scale generated on the surfaces of each of the sheet bars 1 and 2 prior to hot finish rolling.
  • the rear end portion of the leading sheet bar 1 and the front end potion of the trailing sheet bar 2 are respectively cut so as to be formed into shapes of the type shown in Fig. 2(a).
  • no gap is present between the two sheet bars 1 and 2 although the leading sheet bar 1 and the trailing sheet bar 2 are abutted against each other.
  • Thickness reduction is applied to at least either the rear end portion of the leading sheet bar 1 or the front end portion of the trailing sheet bar 2 at least at their corners, as indicated in Fig. 2(b).
  • the sheet bar portions on which thickness reduction is effected include at least the two widthwise directional ends, or corners, in order to enable the positions adjacent to the widthwise directional ends to be heated and joined up. Otherwise, the sheet bars can be easily broken apart during finish rolling.
  • the metal flow taking place at the time of thickness reduction will cause at least the two end portions to be brought into contact with each other and will cause a gap such as (g) of Fig. 2(c) to be formed between the leading sheet bar 1 and the trailing sheet bar 2.
  • a combination of heating by the thermal joining device 6 and pressing by adjusting the conveyance speed of the sheet bars 1 and 2 generates compressive stress at the end portions of the leading sheet bar 1 and the trailing sheet bar 2 as shown in Fig. 2(c) so that the two sheet bars 1 and 2 are brought into contact with each other and joined up. Then, the joined sheet bars 1 and 2 are sent to the hot finish rolling mill 3 of Fig. 1.
  • the regions joined up are only regions adjacent to the corners of each of the sheet bars 1 and 2 as shown in Fig. 2(c), they can be joined up in an extremely short time while maintaining a gap (g) between the joined portions.
  • the aforesaid gap (g) is formed due to the residual gap created by the metal thickness reduction at the corners.
  • When rolling is performed as shown in Fig. 2(d) further metal flow fills up the gap (g) since the portion around the gap is relatively thick in comparison to the corners.
  • the ends of sheet bars 1 and 2 are strongly joined over the entire widthwise surface as shown in Fig. 2(e). Therefore, even if the material to be rolled is later subjected to tension for the purpose of adjusting its dimension in hot finish rolling, the two sheet bars cannot be easily broken away or separated from each other.
  • each of the sheet bars may be formed into various shapes such as flat shapes as shown in Fig. 3(a), or combinations of convex and concave portions as shown in Figs. 3(b) and 3(c). Therefore, the present invention can be applied to any sheet bars which have been cut in ordinary hot-rolling processes.
  • Various cutting means may be used for forming the aforesaid shapes, including shearing means, gas cutting means or laser fusing means, for example.
  • a device having pressing rolls 5 as shown in Fig. 1 may be used.
  • the pressing rolls 5 for use in the present invention are, as shown in Fig. 1, disposed in such a manner that a pair of the pressing rolls is disposed at each of the sheet bar corners, the roll having a body length which is longer than 0.1 times the width of the material having the maximum width. Furthermore, the pressing roll device has a mechanism for shifting its position widthwise to suit the width of the sheet bar, and includes a pressing mechanism for applying a predetermined thickness reduction, and a synchronizing mechanism for causing the left and the right pressing rolls to press the sheet bar in synchronization with each other.
  • the invention may use an anvil for the forging step.
  • the two sheet bars 1 and 2 are caused to abut against each other as in Fig. 1.
  • the heating and pressing steps may be performed by any of the following methods:
  • the methods (iii) and (iv) are particularly effective because the sheet bars can be well joined by simple pressing since the sheet bars may be heated to a temperature of about 1000 to 1100°C at an early stage of the hot finish rolling process, and therefore heating performed simultaneously or immediately after the commencement of the pressing work will enhance joining so that the time taken to complete the joining can be shortened and the quantity of heating power can be reduced.
  • the type of heating means according to the present invention is not limited particularly; any means may be selected including a gas burner, electric heating means or induction heating means.
  • any means may be selected including a gas burner, electric heating means or induction heating means.
  • induction heating arranged as shown in Fig. 4 so that an alternating field is caused to pass through the thickness of the sheet bar before it is applied (hereinafter such a method is called the "transverse method").
  • reference numeral 10 represents an alternating field generating coil for generating an alternating field which passes through the sheet bars 1 and 2 in the direction of their thicknesses.
  • the coil 10 is, as shown, composed of a pair of cores 10a which are arranged vertically above and below the sheet bar 1, a coil 10b continuously wound around the cores 10a, and a power source 10c.
  • the joining process can be satisfactorily performed at a temperature of about 1250°C or higher, the end portions of the sheet bars might be caused to melt if the heating temperature is too high. Therefore, it is preferable to control the temperature of heating to about 1450°C or lower.
  • the pressing step can be easily performed by using pinch rolls 11 and 12 (Fig. 6) disposed to interpose the abutment portion (a) at the end portions of the sheet bars.
  • a sufficient pressing force is about 3 to 5 kg/mm2.
  • Reference numeral 13 of Fig. 6 represents a heating device.
  • sheet bar deformation starts from the two corner portions or end portions, which are the hottest regions on the sheet bar. Therefore the joined regions are gradually extended from the two ends or corners toward the central portion so that the joining force is effectively strengthened.
  • the joining allowance W at each of the corners be about 0.1 times or more of the sheet bar width B (Fig. 7) at each end. Therefore the total sum of the two may be about 0.2 times or more of the sheet bar width. If the total sum of the joining allowances is smaller than about 0.2 times the width of the sheet bar, there is a danger that the leading and trailing sheet bars may be broken and separated from each other with ensuing hot finish rolling.
  • Fig. 7 is a graph which illustrates a typical relationship between joining allowance and occurrence of breakage at finish rolling.
  • a hot-rolling line arranged as shown in Fig. 1 was used to perform continuous hot-rolling as follows: Serving as the leading and trailing sheet bars, sheet bars having a width B of 1000 mm and a thickness of 30 mm were used. Furthermore, two pairs of pressing rolls 5 each having a diameter of 320 mm and a width of 200 mm were disposed as shown in Fig. 8. The inner distance between the two end surfaces of the pressing rolls 5 was accordingly 800 mm (Fig. 8). Furthermore, the inner end portion of the pressing roll 5 was located at a position 100 mm inside of each corner of the sheet bar.
  • the leading sheet bar 1 was moved to a point at which the rear end portion of the leading sheet bar 1 trailed 50 mm behind the axis between the centers of the pressing rolls 5 (see Fig. 9(a)). In this position, pressure was applied until the distance between the two pressing rolls 5 became 26 mm. The distance between the pressing rolls 5 became 26 mm by the time the rolling had moved the leading sheet bar 1 by about 25 mm from the start of rolling (see Fig. 9(b)). Rolling was then similarly applied to the rear end portion of the leading sheet bar 1 in the aforesaid manner.
  • the leading sheet bar 1 and the trailing sheet bar 2 then moved to the pressing device 6 (Fig. 6), and the pinch rolls 11 and 12 shown in Fig. 6 were used to abut the two sheet bars 1 and 2 against each other. Then, the two sheet bars 1 and 2 were pressed with a force of 3 kgf/mm2 by the pinch rolls 11 and 12 while heating them by using a solenoid coil type induction coil (supplied electric power: 4000 kW, frequency: 500 Hz) shown in Fig. 4. Heating and pressing were stopped when the gap at the center of the bar ends became 5 mm as shown in Fig. 12. Then, hot finish rolling was effected on the sheet bars and a hot-rolled sheet having a thickness of 3 mm was manufactured.
  • a solenoid coil type induction coil supplied electric power: 4000 kW, frequency: 500 Hz
  • the initial central gap at about 10 mm.
  • the gap is desirably selected on the basis of the amount of pressing needed to obtain satisfactory joining. Therefore the gap may vary depending upon the type of the steel, the material and the temperature applied. It is preferable that the gap be substantially about 0.1 times or more the thickness of the sheet bar. According to this embodiment, the thickness reduction work was so performed that the initial gap of about 10 mm could be obtained controlling the gap that remains after the pressing work to about 5 mm in order to obtain a compression of about 5 mm.
  • the final gap was beneficial to control the final gap to a value of about 5 mm.
  • a predetermined heating temperature cannot always be obtained when heating is performed by the transverse method because, if a contact region is generated in a portion other than the two ends, an induced electric current is generated in the contact region. Therefore, it is preferable to minimize the size of the gap at the central portion realized after the heating and pressing work has been completed, but that the end portions except for the two ends do not contact. From the viewpoint of practical use, it is preferable that the gap be controlled to be about 5 mm in size.
  • Finish rolling work was subsequently performed, and a hot-rolled sheet having a thickness of 3 mm was produced.
  • Fig. 13 of the drawings schematically illustrates a further embodiment of the present invention.
  • reference numeral 1 represents a leading sheet bar which has passed through a rough rolling mill
  • 2 represents a trailing sheet bar.
  • 3 represents a hot finish rolling mill having rolling mill stands F1, F2,..., arranged in a tandem manner
  • 4 represents a cutting device for cutting the front and rear end portions of the sheet bars.
  • Reference numeral 14 in Fig. 13 represents a working device for upsetting metal in the region of the rear end portion of the cut leading sheet bar 1 and/or the front end portion of the cut trailing sheet bar 2, except for at least the corner portions.
  • the upsetting device 14 includes pressing rolls 15 (Fig.
  • Reference numeral 6 represents a thermal joining device for thermally joining the upset sheet bars
  • 7 represents a scale breaker for removing scale generated on the surface of each of the sheet bars 1 and 2 prior to hot finish rolling.
  • the rear end portion of the leading sheet bar 1 and the front end portion of the trailing sheet bar 2 are preliminarily cut into the shapes shown in Fig. 14(a). In this configuration no gap is present between the two sheet bars 1 and 2 although the leading sheet bar 1 and the trailing sheet bar 2 are caused to abut against each other. Then, upset work is effected on at least either of the rear end portion of the leading sheet bar 1 or the front end portion of the trailing sheet bar 2 in a region not including the two widthwise directional ends (corners).
  • the thicknesses of the upset portions are increased due to the upset work as shown in Fig. 14(b) (according to the Fig. 14(b) embodiment the upset work is effected on both the rear end portion of the leading sheet bar 1 and the front end portion of the trailing sheet bar 2), and a gap is created in the portion, on which the upset work has been effected, when the leading sheet bar and the trailing sheet bar are caused to abut against each other.
  • a combination of heating effected by the thermal joining device 6 and pressing performed by adjusting the relative speeds of conveyance of the sheet bars 1 and 2 generates compressive stress in a region adjacent to the two corner portions of the leading sheet bar 1 and the trailing sheet bar 2 as shown in Fig. 14(c) so that the two sheet bars 1 and 2 are brought into contact with each other and joined. Then the joined sheet bars 1 and 2 are sent to the hot finish rolling mill 3 and are subjected to hot finish rolling.
  • the regions joined on the inlet side of the hot finish rolling mill 3 are only regions adjacent to the corners of each of the sheet bars 1 and 2 as shown in Fig. 14(c), they can be joined in an extremely short time while having a gap (g).
  • the aforesaid gap (g) is formed due to the residual gap created by the upset work performed prior to abutment joining.
  • the thickness of the upset portion has been increased due to metal deformation caused by the upset work.
  • each of the sheet bars 1 and 2 can be strongly joined over the entire abutting surface as shown in Fig. 14(e). Therefore, even if the material to be rolled is subjected to tension for the purpose of adjusting dimension in finish rolling, the two sheet bars cannot be easily broken or separated from each other.
  • each of the cut portions at the ends of the sheet bar may be formed into various shapes such as flat shapes as shown in Fig. 3(a), or combinations of a convex portion and a concave portion as shown in Figs. 3(b) and 3(c).
  • cutting means for forming the aforesaid shapes shearing means, gas cutting means or laser fusing means may be employed.
  • a device For performing the upset work, a device may be used having the pressing rolls 15 as shown in Fig. 13, or an anvil for the forging work may be employed.
  • the widthwise position to which the upset work is applied may be determined to be any portion except at least the two corners of each sheet bar.
  • the two sheet bars are caused to abut against each other, and heating and pressing are effected.
  • the heating and pressing steps may be performed by any of the following methods:
  • the joining allowance W at each of the widthwise spaced ends (corners) be about 0.1 times or more of the sheet bar width B at each end and therefore the total sum of the same may be about 0.2 times or more.
  • heating means similar to those employed in the embodiments previously described may be employed.
  • a hot-rolling facility arranged as shown in Fig. 13 was used to perform continuous hot-rolling as follows: as the leading and trailing sheet bars, low carbon steel sheet bars having a width of 1000 mm and a thickness of 30 mm were used.
  • the rear end portion of the leading sheet bar and the front end portion of the trailing sheet bar were cut so as to be formed into flat shapes as shown in Fig. 14(a).
  • Upset work was effected on the central region except for corner portions of 100 mm of each sheet bar in order to create a gap having a size of 10 mm.
  • the space bars were caused to abut against each other as shown in Fig. 15. Heating and pressing were performed, narrowing the gap so that a shape as shown in Fig. 16 was formed.
  • the heating and pressing conditions were the same as those according to Example 1.
  • the leading sheet bar and the trailing sheet bar are partially joined ahead of the hot finish rolls and the end portions of the sheet bars but not the intervening portions are brought into contact with each other and joined as described. Continuous hot-rolling at excellent productivity rates, while eliminating the danger of breakage or separation of the joined portion, is effectively realized.
  • Figs. 11 and 12 show joined metal portions at the corners of the abutting edges of the sheet bars, with a gap in between, the bars may be configured to abut at one or more inner portions, with gaps provided at the corners.
  • more than one gap portion may be provided, and these may be arranged in various configurations.
  • a gap is at a corner or not surrounded by metal, it should preferably be heated by a burner rather than by induction heating.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Claims (4)

  1. Procédé d'assemblage de plaques métalliques en butée convenant au laminage à chaud de finition sans danger important de rupture ou de séparation ultérieure, les étapes comprenant :
    - la découpe des extrémités avant et arrière desdites barres plates (1, 2) avant de poursuivre le travail sur les barres plates ;
    - prévoir sur les bords en butée desdites barres plates une partie en saillie qui dépasse vers l'autre desdites barres pour former une zone de contact (a) ;
    - prévoir en position adjacente à la zone de contact au moins une zone d'espace (g) dans laquelle les barres plates ne sont pas en contact l'une avec l'autre;
    - travailler le métal d'au moins un desdits bords de barres plates pour obtenir autour de ladite zone d'espace une region ayant une épaisseur de métal supérieure à l'épaisseur du métal dans ladite surface de contact (a), et
    - combler ladite zone d'espace en déplaçant du métal depuis ladite zone ayant une épaisseur supérieure de métal.
  2. Procédé selon la revendication 1, dans lequel l'étape de travail comprend un travail de réduction d'épaisseur effectué sur les deux extrémités dans la direction transversale desdites barres.
  3. Procédé selon la revendication 1 ou 2, dans lequel ladite étape de travail comprend un travail de repoussage effectué sur la région centrale desdites barres plates dans la direction de la largeur.
  4. Procédé selon l'une des revendications précédentes, dans lequel au moins une zone d'espace est située dans un angle des bords en butée desdites barres plates.
EP92113929A 1991-08-16 1992-08-14 Procédé pour le laminage continu à chaud de bandes Expired - Lifetime EP0528385B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3229754A JPH0550112A (ja) 1991-08-16 1991-08-16 鋼片の連続熱間圧延方法
JP229755/91 1991-08-16
JP22975591 1991-08-16
JP229754/91 1991-08-16

Publications (2)

Publication Number Publication Date
EP0528385A1 EP0528385A1 (fr) 1993-02-24
EP0528385B1 true EP0528385B1 (fr) 1996-01-17

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EP92113929A Expired - Lifetime EP0528385B1 (fr) 1991-08-16 1992-08-14 Procédé pour le laminage continu à chaud de bandes

Country Status (5)

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US (1) US5217155A (fr)
EP (1) EP0528385B1 (fr)
KR (1) KR950009139B1 (fr)
CA (1) CA2076169C (fr)
DE (1) DE69207673T2 (fr)

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Publication number Priority date Publication date Assignee Title
WO1994029040A1 (fr) * 1993-06-15 1994-12-22 Kawasaki Steel Corporation Procede pour laminer a chaud en continu des pieces metalliques, appareil et organes a cet effet
BR9603035A (pt) * 1995-07-10 1998-05-05 Kawasaki Steel Co Método e aparelho para laminação a quente de acabamento contínua de tiras de aço
US5871137A (en) * 1996-04-20 1999-02-16 Ege; Sigmund Automated butt splicer for copper-based tapes
US5957369A (en) * 1996-05-09 1999-09-28 Elpatronic Ag Method for connecting two workpieces together
KR100655525B1 (ko) * 1998-11-18 2006-12-07 엘파트로닉 아게 레이저에 의한 강판의 용접 장치 및 그 용접 장치의 용도
AUPP901399A0 (en) * 1999-03-03 1999-03-25 Gray, Evelyn Frances High speed metal joining process
WO2008028005A2 (fr) * 2006-08-31 2008-03-06 Duetto Integrated Systems, Inc. ensemble et système tête de métallisation
DE102019214295A1 (de) 2018-11-26 2020-05-28 Sms Group Gmbh Verfahren zum Verschweißen zweier Brammen
DE102021207942A1 (de) * 2021-07-23 2023-01-26 Sms Group Gmbh Verfahren und Vorrichtung zum Herstellen eines metallischen Bandes

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Publication number Priority date Publication date Assignee Title
JPS532362A (en) * 1976-06-30 1978-01-11 Hitachi Ltd Butt welding
JPS5886989A (ja) * 1981-11-19 1983-05-24 Mitsubishi Heavy Ind Ltd 拡散溶接による継手溶接法
DE3517090A1 (de) * 1985-05-11 1986-11-13 SMS Schloemann-Siemag AG, 4000 Düsseldorf Verfahren zum walzen von vorband zu warmbreitband
US4983241A (en) * 1988-01-28 1991-01-08 Fuji Photo Film Co., Ltd. Method of splicing webs
EP0354574B1 (fr) * 1988-08-11 1997-03-12 Fuji Photo Film Co., Ltd. Procédé pour joindre des bandes métalliques
US5121873A (en) * 1990-06-06 1992-06-16 Hitachi Ltd. Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system
DE69123040T2 (de) * 1990-08-02 1997-03-06 Kawasaki Steel Co Verfahren zum kontinuierlichen warmwalzen von stahlblech und verfahren zum verbinden desselben
CN1037587C (zh) * 1990-08-02 1998-03-04 川崎制铁株式会社 接合钢坯的热连轧方法
US5260541A (en) * 1990-12-10 1993-11-09 Hitachi, Ltd. Crop shear apparatus and crop shear equipment

Also Published As

Publication number Publication date
KR930003979A (ko) 1993-03-22
KR950009139B1 (ko) 1995-08-16
CA2076169C (fr) 1995-09-05
DE69207673T2 (de) 1996-05-30
CA2076169A1 (fr) 1993-02-17
US5217155A (en) 1993-06-08
DE69207673D1 (de) 1996-02-29
EP0528385A1 (fr) 1993-02-24

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